Improved extension-table slide



f extended, are arranged in an upwardly-convex curve vot'slight degree, but sufficient to'brace the table up- @wat dtiiiiw.

'HENRY oLDs, or sY Letters Patent N 104,340, dated June 14, 18,70. Y

RAGUSVE, NEW YORK,

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern:

`Be it known that I, HENRY OLDs, of Syracuse, in the countyof Onondaga and State of New York, have invented a new and-valuable Improvement in Extension-table Slides; and I do hereby declare that the following is a full, clear, 'and exact description of the construction and operation of the same, reference being had to the annexed drawing, making a part of this specification, and to the letters and-tignres of reference marked thereon.

Figure l of the drawing is a representation of my invention in perspective.

Figure 2 is a top view thereof.

Figure 3 isa perspective view of theinetal slide.

' Figure 4 is a transverse vertical section, and

Figure 5 is a longitudial vertical section.

My invention relates tothe sliding frames of extension tables, and consists, mainly, in the formation of the metal slides which connect the extension hars, whereby the bearings of the latter, when the table is firmly, and to prevent sagging or bearing down in thc center.

The letter A ot the drawing designates the slidingr bars, provided with the longitudinal grooves a a, in their upper and lower edges.

The short vertical flanches ce ot` the metal slide` work in these grooves, and thereby hold the bars together. 4 Y

The outer wall of each groove o is i'ormed by a tongue or strip, z, which does not extend upward or downward, as the case may be, until it is even with the top or bottom of thebar; but a difference is made suiiicient to allow the free passage of theA tops of thc metallic slides B, when the leaves of' the table are'in position.'

Further, in order to make the tops of the bars level, these tongues or strips z are slightly inclined, usually with reference thereto, as hereinafter explained.

B represents the metal slide, T-shaped in its transverse vertical section.

lhe short vertical ianches ec operate inthe grooves a o ofthe extension bars, and serve to bind them iogether. l l

The main stem d of the slide-works between the extension bars, andy serves to keep them separate.

Sntiieient thickness is given to this stem to prevent any springing or vwarping of the faces of the bars li-om bringing them together, and causing them to bind against each other.

lThe recess n, on one side of the main stem l of the slide, is formed somewhat deeperthan its fellow upon other end, but on the same side ofthe stem d, is made more shallow than its fellow.

The horizontal wall of each recess, or that which is formed by the head n of the metal slide, is the bearing-surface, which is in contact wit-h the inclined or bearing-surface of the strip lach slide B is usually secured firmly at the end ot'ancxtcnsion bar A, in such a manner that those bars which lie at the extremities of the set, and are iixcd to the body ol' the table, shall have each one slide attached, while the intervening or movable barsshall each have two slides secured thereto, one at each end, but on opposite sides of the bar.

'lhe design ot' the arrangement is such, that each groove t of the extension bar shalll receive the fixed iianch c ot one slide, and the movable i'lanch c oi' another.

At the same time, each groove should receive the ianch vor outer wall ot' a deep recess, n, and that oi' a shallow recess, n', and it will be observed that, in the upper strips ot' the system, the deep recesses are iixed, and the shallow recesses areinovable, while on \,thc lowci' strips s the reverse arrangement obtains,

the deep recesses only sliding on the strips The effect of this arrangement is to give the bearing-surfaces of cach sliding Vbar a slightly inclined position, with reference to those `of the preceding bar, the succession producing, when the table is extended, a slight convexity, highly favorable. to its strength and tirniness; and, although the strips receive thc necessary inclination to produce this convcxity of bearing, the upper surfaces ot' the bars muy he perfectly lcvcl throughout the succession.

1f' the bearing-suriaccs ot' the walls he made parallel with the top and bottom edges ot' the bar, a convexity will be produced in the table-top.

Studs c c are placed in suitable positions in thc slides to prevent action in either direction beyond a certain point.

Such a table should nevel' bind in the sliding.

The bearing-surfaces can always have sufficient play to permit them to be easily moved, with reference to each other, while thc conformation thereof will effectually prevent sagging or bearing down in the center when the table is extended.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. In combination with Vthe slide bars-A, having tongues z, grooves a, and stops c, the metal slide B, having separating stem d, iianches c c, and alternate shallow and deep recesses n n', when constructed and arranged as herein shown and for/.thc purpose specified. i

the other side, while the opposite recess n', at the 2. The metal 'slide B, provided with connecting s 10mm l 2 flanches c c,4 senarnt-ing stem or wall d, and alternate In testimony that I'laim the above, I have heifeslmllow and deep recesses orgrooves fn n,' substanunto subscribed my name in @he presence of two wit*- tially as shown and described. uesses.

3. The slide-bar A, provided with the inclined planes v Y HENRY OLDS. z z,` whenconstrncted and arranged to operate in con- Witnesses: nection with a. metal connecting-slide, as :md for the -HORACE WHEATON,

purpeses herein shown and desribed., EVERETT R. LEWIS. 

